I am looking at Atrium 8700 (fixed & casement), based on the data on their website i will be get all the feature i'm looking for in NY install. My question is there anyone with hand on experience with this model. It is not the reliabilt brand that is sold in lowes. Any help will be appreciated.

I believe that is the "higher end" model from that manufacturer, however generally speaking they are not held in the same esteem as the top vinyl window choices. Per your other thread it sounds like you are considering Okna as well, that's a pretty easy choice in this comparison IMO.

Agree. When we say atrums “ higher end” we are only comparing to other atrium products which isnt saying much.
Okna is in a totally different class and much higher end than anything atrium offers in my opinon.